(Reuters) Hedge fund Citadel said it is making changes at the top of its global quantitative division by bringing back James Yeh to replace the current head who is retiring.
Jonathan Graham, who has headed the unit for four years, is leaving the $26 billion hedge fund to take a break from finance, Citadel spokesman Zia Ahmed said on Tuesday. Graham worked for Citadel for 13 years and is based in Chicago.
